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SubjectRe: [PATCH 06/10] signal: fix premature completion of group stop when interfered by ptrace

On Tue, Feb 01, 2011 at 09:44:05PM -0800, Roland McGrath wrote:
> > I have plans on separate out ptrace related stuff from task_struct so
> > that they're allocate iff they're used which will save some tens of
> > bytes on the task struct, so there at least is a plan to compensate
> > for the added cruft.
> My, that sounds familiar. Oleg and I have pursued that before, though
> not in exactly the same context. It sure gets complicated quickly in
> the corners. But we would still like to see it get done one way or
> another.

Yeap, I have mostly working code. It was necessary to allow nesting,

> > > But I'm not entirely convinced that we'll really need them when we
> > > conclude on fully cleaning up the whole picture.
> >
> > I really don't know at this point. I tried to make it share one of
> > the related fields but there needs to be a per-task field which is
> > protected by siglock and there currently isn't any, so...
> My point was that I am not yet convinced we'll need any new bookkeeping of
> that sort once we fully work out the group-stop interactions. We're still
> discussing that in the other threads. So we'll see where that goes.

Yeah, sure.



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